This article studies A study of security of Nockdundoe(鹿屯島; down area of the Duman-River) and Lee-il(李鎰) of North commander(咸慶北道兵馬節度使) in the middle age of Chosun Dynasty. Take care of this study, First of all, writer took a system of military affairs and reform of military administration of the middle of Chosun-Dynasty. Accordingly this, we are capable of Limites of the Jin-guan System(鎭管體制; defence of 鎭管) and effective Campaign of defence(制勝方略) in the Jurchen area. And in the 16 century, Accordingly military service and reform bills of military adminstration of lee-li(李珥) and You-sung roung(柳成龍) we have confirmed inconsistency and limitation of defence system of Chosun Dynasty. Second of all, writer took Jurchen campaign of North commander of military Lee il(李鎰) and Nocdundoe(down area of the Duman-River). Third of all, took Life of Lee-il(李鎰) General of military and his activities the early days of Japanese invasions in 1592. Specially this 2, 3 chapter, writer took campaigns and activities Lee-il(李鎰) of North commander of military and Lee-il(李鎰) of General the early days of Japanese invasions in 1592. Accordingly this studies, writer requested truly-valuation of Lee-il(李鎰) of General the early days of Japanese invasions in 1592, and careful judge a person by true materials.

This article studies A study of security of Nockdundoe(鹿屯島; down area of the Duman-River) and Lee-il(李鎰) of North commander(咸慶北道兵馬節度使) in the middle age of Chosun Dynasty. Take care of this study, First of all, writer took a system of military affairs and reform of military administration of the middle of Chosun-Dynasty. Accordingly this, we are capable of Limites of the Jin-guan System(鎭管體制; defence of 鎭管) and effective Campaign of defence(制勝方略) in the Jurchen area. And in the 16 century, Accordingly military service and reform bills of military adminstration of lee-li(李珥) and You-sung roung(柳成龍) we have confirmed inconsistency and limitation of defence system of Chosun Dynasty. Second of all, writer took Jurchen campaign of North commander of military Lee il(李鎰) and Nocdundoe(down area of the Duman-River). Third of all, took Life of Lee-il(李鎰) General of military and his activities the early days of Japanese invasions in 1592. Specially this 2, 3 chapter, writer took campaigns and activities Lee-il(李鎰) of North commander of military and Lee-il(李鎰) of General the early days of Japanese invasions in 1592. Accordingly this studies, writer requested truly-valuation of Lee-il(李鎰) of General the early days of Japanese invasions in 1592, and careful judge a person by true materials.

NocKdundoe(down area of the Duman-River), North commander of military, Campaign of defence, Jurchen campaign, A Picture of Subjugation(collective village SiJun of Jurchen), A collection of Jang yang gong